This paper proposes a 12-bit 180 MS/s current-steering digital-to-analog converter (DAC) with cascaded local-element matching (C-LEM) schemes to significantly reduce the required number of current cells in the DAC to 28, a reduction of 99.32 % compared to the amount of required in the conventional 12-bit full thermometer-coded switching techniques. The bias circuits in the DAC use simple source follower-based level shifters to obtain the required bias voltages, simplifying the circuit configuration considerably. The prototype DAC shows the measured differential non-linearity (DNL) and integral non-linearity (INL) within 0.50 LSB and 0.78 LSB, respectively. The DAC achieves a peak spurious-free-dynamic range (SFDR) of 65.33 dB at 180 MS/s. The output current and total power of the prototype DAC are 10 mA and 38.2 mW, with analog and digital power supplies of 3.3 V and 1.8 V, respectively.
机构:
Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA
Univ Calif San Diego, Inst Neural Computat, La Jolla, CA 92093 USAJohns Hopkins Sch Med, Dept Biomed Engn, Baltimore, MD 21205 USA
机构:
Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA
Univ Calif San Diego, Inst Neural Computat, La Jolla, CA 92093 USAJohns Hopkins Sch Med, Dept Biomed Engn, Baltimore, MD 21205 USA
机构:
Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA
Univ Calif San Diego, Inst Neural Computat, La Jolla, CA 92093 USAJohns Hopkins Sch Med, Dept Biomed Engn, Baltimore, MD 21205 USA
机构:
Univ Calif San Diego, Dept Bioengn, La Jolla, CA 92093 USA
Univ Calif San Diego, Inst Neural Computat, La Jolla, CA 92093 USAJohns Hopkins Sch Med, Dept Biomed Engn, Baltimore, MD 21205 USA